Filtering apparatus.



G. W. DURBROW. PILTERING APPARATUS. APPLIOATIOK FILED OUT. 22, woe.

Patentd Aug. 2, 1910.

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GEORGE W. DURBROW, OF INDIO, CALIFORNIA.

FILTERING APPARATUS.

Specification of Letters Patent.

Patented A11 2, 1910.

Application filed October 22, 1906. Serial No. 340,102.

To all whom it may concern:

Be it known that I, GEORGE W. DURBROW, a citizen of the United States,residing at Indio, in the county of Riverside and State of California,have invented an Improved Filtering Apparatus, of which the following isa specification.

This invention relates more particularlyto, and is an improvement upon,filtering apparatus of the character described in United States PatentNo. 828,467, granted to me August 14, 1906.

The objects of this invention are to improve upon the filteringapparatus described in said patent, by providing means for more readilyinserting and removing the filtering members for the purpose of cleaningthe same or renewing the filtering material; to provide an absolutelywater-tight fitting around the filtering members, and to provide animproved cage for holding granulated filtering material.

Another object is to provide a more compact filtering apparatus so thatthe body portion thereof may be formed as a single casting.

A further object is to provide improved means for infusing into theliquid being filtered, coagulating chemicals that will pr'e cipitateimpurities into the sediment receptacles with which the apparatus isprovided.

Other objects may hereinafter appear.

The invention consists in the general and specific combinations of partshereinafter described and claimed.

The accompanying drawings illustrate the invention.

Referring to said drawings: Figure 1 is a longitudinal section of theentire apparatus except that the filtering cage nearest the right-handend of the apparatus is removed. Fig. 2 is a plan view of the apparatus,partly in section. The line av -00 Fig. 1, indicates the line of sectionfor the sectioned portion of the view. Fig. 3 is a cross-section on line00 -0c of Figs. 1 and 2. Fig. 4 is a perspective of one of the filteringcages broken away to show the shape of the bottom of the cage. Fig. 5 isa plan view of the sheet metal blank out of which the metal cage isformed, dotted lines indicating where the same is bent.

The conduit 1 which forms the body portion of the filter is provided atone end with an inlet 2 and at the other end with an outlet 3; saidconduit increases in size from the inlet to the outlet, and has a seriesof sediment receptacles or sumps as 4, 5 and 6, located therebeneath,said receptacles being provided with valves 7, 8 and 9, leading into ahorizontal channel 13 provided with an outlet 14. The main conduit 1 isprovided adjacent to and on the down-stream side of each of the sumps 4,5 and 6, with a filter proper through which passes all the liquid of thecurrent which flows through the apparatus. The construction thus fardescribed is similar in its main features to that of my former patentabove referred to.

15, 16 and 17 designate the filters proper, the filter 17 being removedfrom the apparatus, as shown in Fig. 1, and shown in detail in Fig. 4.

The filter body 1 is provided with a series of internal grooves 18, 19and 20, which constitute seats in which the respective filters 15, 16and 17 are seated. A series of closures such as plates 21, 22, 23,are'provided for openings located opposite said seats, preferably in thetop side of the body 1, in order that the filters may be readily put inplace and removed; fastening devices such as threaded bosses 24 and nuts24 screwing thereon being provided for clamping said plates against thefilters to make the filters fit snugly into their seats.

The filter cages are widest at the top and taper toward the bottom, asbest shown in Fig. 4, the seats 18, 19 and 20 being correspondinglytapered away from the closures 21, 22 and 28, so that when said closuresare clamped against the top of the filter cages, the latter are tightlywedged into the seats, this effect being augmented by the V-shape of thegroove and the corresponding shape of the edge of the filter cages.

Referring more in detail to the structure of the filter cages 15, 16 and17, each of said cages is preferably of the same form, being made of asheet-metal blank, shown in Fig. 5, which is bent to form a ti-shapedbead 25 extending around the side edges and the bottom of the cage.

Each of the seats 18, to correspond in shape to that of said bead 25, inorder that the filters may be fitted water-tight under the pressure ofthe closures 21, 22 and 28, which are forced thereagainst by means ofthe nuts 24. When clamped in place, said closures close the 19 and 20 isformed open tops of the filter cages as well as the openings in the topof the filter-body.

In a small-sized filter, a rubber band, not shown, may be placed aroundthe filter or the filter cage for the purpose of assisting in making thejoint water-tight when the cap is in place. In large filters where arubber band would not be desirable, a gasket of other material could beused instead.

Each of the filter cages is furnished throughout substantially theentire extent of each side face with perforations a for allowing liquidto pass through gravel or other granulated filtering material 26 withwhich the cages are filled.

lVhile the filter construction illustrated in the drawings and justdescribed, is the con struction which I at present deem best forcarrying out principles of this invention, it is to be understood thatvariations may be made at the discretion of the mechanic, withoutdeparting from this invention.

One of the advantages secured by the con struction of filteringapparatus as above described, other than those possessed by thefiltering apparatus set forth in my former patent, is that the sedimentreceptacles are placed closer together, the whole apparatus beingrendered much shorter and more compact, so that it may be formed as asingle casting, thereby making a solid construction and lessening thecost of manufacture. The comparatively narrow closures 21, 22 and 23make this construction possible. Said clo sures are easily removed andfastened in place and aiford a ready means of uncovering the openings atthe top side of the filter conduit 1 for the purpose of inserting andremoving the filter cages in order to renew the filtering material whenthis is necessary. Filter cages constructed otherwise than I havedescribed may of course be used in the apparatus without departing fromthe broad principles of the invention.

For the purpose of more thoroughly separating foreign material from theliquid being filtered, I may provide one or more air tight cups 27, 28,29, which supply a coagulant such as a liquid solution of sulfate ofaluminum, over the sumps, to assist in precipitating the solidsthereinto. 3O designates the discharge nipples, and 31 the stopcocks ofsaid cups. In applying the coagulant by means of the cups, differentcoagulants can be applied; as, in cup 27 caustic soda might be used, incup 28, sulfate of aluminum, and in cup 29, bicarbonate of soda. I namethese coagulants as the best known for the purpose desired. When thethree chemicals above specified are used, the effect of the first willbe to throw the liquid salts into solids; the second,sulfate ofaluminum,-to assist in removing the salts before they pass through thefilter; the third,-bicarbonate of soda,to soften the water. In caseswhere the waters to be filtered are of different natures, theapplications of different coagulants may be changed as desired. In usingdifferent coagulants for the purification of water, the 1 are intendedmore particularly for the purification of water to be used in steamboilers.

hat I claim is l. A filter comprising a horizontal conduit having aninlet at one end and an outlet at the other and provided with topopenings and sumps arranged between the open ings, valved outlets forthe sumps, V-shaped filter-seats registering with the openings, V-shaped filters in the filter-seats and closures for the openings holdingthe filters in place.

2. A filter comprising a conduit having an inlet at one end and anoutlet at the other, said conduit growing larger toward the outlet andprovided with openings in its top and with sumps between the openings,valved outlets for the sumps, V-shaped filter-seats registering with theopenings, filters having V-shaped edges in said seats, and closures forthe openings forcing the filters into the seats.

3. A filter comprising a horizontal conduit having an inlet at one endand an out let at the other and provided with top side openings andsumps between the openings, valved drains for the sumps, V-shaped filterseats between the sumps registering with the openings, filters havingVshaped edges inserted downwardly into said seats, caps for closing saidopenings and forcing the filters downwardly into the seats, and removable nuts holding the caps in place.

4. In combination, a conduit having a side opening and an internal seatopposite said opening and extending around the portion of the conduitnot occupied by the opening, said seat having side portions taperingaway from said opening, a closure for said opening, a filter in saidseat tapered to fit the same, and means for clamping said closureagainst said filter to crowd the same into said seat.

5. In combination, a conduit having a side opening and an internalgroove opposite said opening and extending around the portion of theconduit not occupied by the opening, said groove having side portionstapering away from said opening, a closure for said opening, a filter insaid groove tapered to fit the same, and means for clamping said closureagainst said filter to crowd the same into said groove.

6. In combination, a conduit having a side opening and an internalV-shaped groove opposite said opening and extending around the portionof the conduit not occupied by the opening, said groove having sideportions tapering away from said opening, a closure for said opening, afilter in said groove having an edge provided with a V- shaped bead tofit said groove, and means for clamping said closure against said filterto crowd the same into said groove.

7. In combination, a conduit having an internal downwardly-tapering seatextending down the sides and across the bottom thereof, adownwardly-tapering filter fitting said seat, there being an openingabove said seat large enough to admit the filter, a closure for saidopening, and means for clamping said closure against the top of saidfilter to crowd the filter into said seat.

8. In combination, a conduit having an internal downwardly-taperinggroove extending down the sides and across the bottom thereof, adownwardly-tapering filter fitting said groove, there being an openingabove said groove large enough to admit the filter, a closure for saidopening, and

means for clamping said closure against the top of said filter to crowdthe filter into said groove.

In testimony whereof, I have hereunto set my hand at Los AngelesCalifornia this 16th day of October 1906.

GEORGE W. DURBROW.

In presence of- ALBERT II. MERRILL, JAMES R. TOWNSEND.

